Lock



E. L. TElCH.

LOCK

APPLICATION FILED MAYh 1919.

Patented July 13, 1920.

INVENTOR E. L. TEICH.

LOCK.

APPLICATION FILED MAY1.1919.

1,346, 142. Patented July 13, 1920.

. 2 SHEETS-SHEET 2.

INVENTOR ZZFZZHZ ERNEST L. TEICH', or new Barrens,

CONNECTICUT.

GQNNEG'IICUT, HARDWARE CORPOR-EiTIG-N, O1 NEi/i'" BRI'JFAXN, C

.H/TERICAN TI, It. GOBPORPJL'ION OF LOCK.

7 Specification of Letters Patent.

Patented July is. race.

Application filed May 1. 1925. Geri-i1 No. 293.972.

To all whom, it may concern: I

Be it known that I, ERNEST L. TnIoH, a citizen of the United States, residing at New Britain, county of Hartford, State of Connecticut, have invented a certain new and useful Improvement in Locks, of which the following is a full, clear, and exact description.

My invention relates to looks, more particularly locks having latch bolts and manually operated means for dogging the latch bolt so as to lock the door. In such looks, as heretofore made, the latch bolt is liable to be inadvertenly dogged when the door is open. When so dogged the latch can notbe forced inward and if the door is closed with the lock in that condition it strikes an unyielding blow against the striker-plate which liable to result in injury to the lock. The object of my invention is to provide means for preventing the inadvertent dogging of the latch when the door is open and thereby guard against the danger just referred to.

The following is a description of a lock embodying my invention, reference being had to the accompanying drawings, 1n which;

Figure 1 shows a plan view of a lock embodying my invention;

Fig. 2 shows a section of the same on the line 2-2, Fig. 1;

Fig. 3 shows a detail of the latch bolt held by the dogging means, looking toward one side;

Fig. 1 is a similar detail, looking downward; I c

Fi is a perspective View of the dog;

Fig. 6 is a perspective view of the dogoperating link; and

Fig. 7 is a perspective view of the guard for preventing the inadvertent setting of the dog.

Referring more particularly to the draw ings, 1 is the frame of a lock, the lock shown being of the well known unit type, having a face-plate 2 carried by and fixed to one side of the frame, and a face-plate 2 upon the other side of the frame but movable relatively thereto. 33 are knobs secured by spindles 4 1- to the frame in the ordinary manner and carrying roll-backs 5-5 resting in recesses in the inner ends of the splndles 4-4; and engaging with the sliding frame 6 to which the latch-head 7 is connected in the ordinary manner. The usual spring 8 tends to hold the sliding frame and latch-bolt in forward position. The knobs 3-3 are provided with pin-tumbler lock cylinders 9 adapted to be operated by proper keys. Connected to these cylinders are spindles 1010, which can be turned 360 respectively by keys inserted into the lock cylinders of their respective knobs. These spindles 10-10 have upon their opposing ends eccentric pins 11-41, which are adapted to engage the sides of a recess 12 in a connecting member 13, whose iear end 13 slides in a hole in the rear of the frame 1 and whose forward end is pivoted at 14 to an arm 15 connected to the dogging device 16, which is carried by a rotatably mounted shaft 1'? so that as the connecting member 13 is reciprocated, the dogging de vice is oscillated to and fro. Whenit is in its left-hand position, as shown in Fig. 3, it dogs the latch 7 so that it can not be retracted by the knobs 33. When it is in its right-hand position as shown in F 2, the latch 7 is free to be retracted by the turning of either of the knobs 3-43. A spring 18 bears against the tail '16 of the dogging device so as to hold it in either of its extreme positions. The dogging device 16 is connected to one-end of the shaft 17, the other end of which carries a dog-controlling projeetion 19, Fig. 5, which oscillates with the dog 16. In order to control the dog, I provide a guard 20, the same being mounted in the construction shown so as to slide upon a rod 21, being pressed toward the right, Figs. 1 and 1, by a spring 22. This guard has an angular projection 23, which, when the door is open, projects for some distance through the right-hand side of the frame 1. hen the door is closed, this projection engages the jamb of the door frame and is forced inward, together with the guard 20. When the dog 16 is in the position shown in Fig. 2 and the door is open, the guard 20 is adjacent to the inner side of the left-hand portion of the frame 1 and lies in the path of the projection 19 so as to prevent the dog being thrown into latch-locking position, holding it in the position shown in Fig. 2 against any manipulation by either of the keys in the knobs 3-3. When, however, the door is closed, the guard 20, on account of the engagement of the projection 23 with the jamb of the door, is automatically moved to the position said latch-bolt, a guard ior said dogging shown in Fig. 4, whereupon it is out of the path of the projection 19 and out of action so that either of the keys of the knobs 8-3" ber 13 so as to throw the dog 16 into the position shown in Fig. 3, thereby dogging or dead-locking the latch-bolt 7. By means of the guard 20 the inadvertent dogging of the latch-bolt, while the door is open, is guarded against and the danger of damage due to shutting the door with the latch dogged isjgreatly reduced.

Aiswill be evident to those skilled in the art, my invention permits of various modifications without departing from the spirit thereof or the scope of the appended claims.

What I claim is: V j

1. In a lock, the combination of a latchbolt, manually operable means for dogging means holding the same out of action when the door is open, and means projecting laterally through the side of the lock for automatically throwing said guard out of action when said door is closed; 7

' 2. In a lock, the combination of a latch- -bolt, two knobs for retracting the same,

means for dogging said latch, key-controlled mechanism in each knob, said mechanismsactuating said dogging means independently, a guard for said dogging means hold- 7 ing the same out of action when the door is open, and means for automatically throwing said guard out of action when said dooriis closed. 7

3. In a lock, the combination of a latchbolt, manually operable means for dogging said latch-bolt, a guard for-said dogging means holding the same out of action when the door is open, and means fonautomatically throwing said guard out of action when said door is closed, said guard consisting of a memberhaving a portion projecting laterally through theside of the lock and being adapted to be moved thereby into and out of the path of said dogging means.

4:. In a lock, the combination of a latchbolt, two knobs for retracting the same, means for dogging said latch, key-controlled mechanism in each knob, said mechanisms actuating said dogging means] independently, a guard for said-dogging means holding the same out of action when the door is open, andmeans for automatically throwing said guard out of action when said door is closed, said guard consisting ofa slide having a projection engaged by the door-frame when the door is closed and thereby thrown out of action. V

5, in a lock, the combination of a latchbolt, a pivot-ed dogging means for dogging said bolt, means for manually actuating said pivoted dogging means, said dogging means having a dog-controlling projection, a sliding guard adapted to move toward and away from the side oi said lock into and out of the path of said projection and having a lateral extension projecting through one side of the lock, and adapted to engage the door-frame when the door is closed.

ERNEST L. TEIOH. 

